Blackbeard's Castle is a historic site located in Charlotte Amalie, the capital of the U.S. Virgin Islands. It is named after the infamous pirate Edward Teach, known as Blackbeard, who is said to have used the site as a lookout point during the early 18th century. The castle features a watchtower and several buildings that reflect the colonial architecture of the period. Today, Blackbeard's Castle is a popular tourist attraction, offering visitors a glimpse into the pirate era and the history of the Caribbean. The site includes a museum, guided tours, and beautiful views of the surrounding harbor, making it a fascinating destination for history enthusiasts.